{adj.}

1. describes a substance capable of causing harm or death, biochemically, to an organism or the environment

2. imparting a bad influence on something; potentially fatal

2. in the near future, as a result of this UD definition, the new it word for cool.
1. Hydrochloric acid is a toxic chemical.

2. Religious fundamentalism is toxic to the human race.

3. Dude, that's a sick fuckin' shirt - it's so sick it's toxic!
by Leroy Brown 420 February 04, 2009
Used to describe a person who is tainted by a subconscious malevolence or psychosis that affects the lifes of those who come into contact with them.
"Toxic-Mum"
A mother that brings nothing but grief to the mental health of her children.
by Peat Bog Man February 06, 2002
something or someone that is attractive and makes you addicted to it or him/her
With a taste of your lips I'm on a ride, you're toxic I'm slippin' under. With the taste of a poison paradise, I'm addicted to you, don't you know that you're toxic? - Britney Spears
by Cali's Vixen February 15, 2004
A new song by Britney Spears that every guy cannot resist watching in total dis-belief!
Don't cha know that you're Toxic!
by Brian February 28, 2004
something to describe an event as being too busy or hectic. It can also be used to describe a stressful person.
Amanda's got a lot of work to do in the office. I don't want to stick with her. She's so toxic.
I have a very toxic schedule. Go away.
by lee30 June 18, 2008
A new Britney Spears song that I like to have random dancing parties to

(and you gotta have the strobe lights)
MBRO and I had a dance party to Toxic last night.
by the pimpster March 05, 2004
a word that can be used to describe something as either extremely good or extremely bad, depending on tone of voice.
wow, that guy has a rockin' bod, it's straight up toxic

or

jeez, that test was so hard, it was toxic, I really thought i was gonna die
by Lizaa June 09, 2007
A song by Britney Spears that not only sound good, but is accompanied by an ultra-sexy video that will make even the queerist of men blow their loads all over hell and half of Georgia.
OMFG Britney Spears was hawt in Toxic!!!
by SAOG April 09, 2005

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